The nearest expiration date for Euro Futures is Nov 15, 2024.
Traders prefer to sell futures contracts when they've already made money on the investment, but still have plenty of time left before the expiration date. Thus, many consider it a good option to sell Euro Futures before Nov 15, 2024.
Open interest is the number of contracts held by traders in active positions — they're not closed or expired. For Euro Futures this number is 53.00. You can use it to track a prevailing market trend and adjust your own strategy: declining open interest for Euro Futures shows that traders are closing their positions, which means a weakening trend.